1 /* 2 * Synopsys Designware PCIe host controller driver 3 * 4 * Copyright (C) 2013 Samsung Electronics Co., Ltd. 5 * http://www.samsung.com 6 * 7 * Author: Jingoo Han <jg1.han@samsung.com> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 */ 13 14 #ifndef _PCIE_DESIGNWARE_H 15 #define _PCIE_DESIGNWARE_H 16 17 /* 18 * Maximum number of MSI IRQs can be 256 per controller. But keep 19 * it 32 as of now. Probably we will never need more than 32. If needed, 20 * then increment it in multiple of 32. 21 */ 22 #define MAX_MSI_IRQS 32 23 #define MAX_MSI_CTRLS (MAX_MSI_IRQS / 32) 24 25 struct pcie_port { 26 struct device *dev; 27 u8 root_bus_nr; 28 void __iomem *dbi_base; 29 u64 cfg0_base; 30 void __iomem *va_cfg0_base; 31 u32 cfg0_size; 32 u64 cfg1_base; 33 void __iomem *va_cfg1_base; 34 u32 cfg1_size; 35 resource_size_t io_base; 36 phys_addr_t io_bus_addr; 37 u32 io_size; 38 u64 mem_base; 39 phys_addr_t mem_bus_addr; 40 u32 mem_size; 41 struct resource *cfg; 42 struct resource *io; 43 struct resource *mem; 44 struct resource *busn; 45 int irq; 46 u32 lanes; 47 struct pcie_host_ops *ops; 48 int msi_irq; 49 struct irq_domain *irq_domain; 50 unsigned long msi_data; 51 DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS); 52 }; 53 54 struct pcie_host_ops { 55 void (*readl_rc)(struct pcie_port *pp, 56 void __iomem *dbi_base, u32 *val); 57 void (*writel_rc)(struct pcie_port *pp, 58 u32 val, void __iomem *dbi_base); 59 int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val); 60 int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32 val); 61 int (*rd_other_conf)(struct pcie_port *pp, struct pci_bus *bus, 62 unsigned int devfn, int where, int size, u32 *val); 63 int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus, 64 unsigned int devfn, int where, int size, u32 val); 65 int (*link_up)(struct pcie_port *pp); 66 void (*host_init)(struct pcie_port *pp); 67 void (*msi_set_irq)(struct pcie_port *pp, int irq); 68 void (*msi_clear_irq)(struct pcie_port *pp, int irq); 69 phys_addr_t (*get_msi_addr)(struct pcie_port *pp); 70 u32 (*get_msi_data)(struct pcie_port *pp, int pos); 71 void (*scan_bus)(struct pcie_port *pp); 72 int (*msi_host_init)(struct pcie_port *pp, struct msi_controller *chip); 73 }; 74 75 int dw_pcie_cfg_read(void __iomem *addr, int size, u32 *val); 76 int dw_pcie_cfg_write(void __iomem *addr, int size, u32 val); 77 irqreturn_t dw_handle_msi_irq(struct pcie_port *pp); 78 void dw_pcie_msi_init(struct pcie_port *pp); 79 int dw_pcie_link_up(struct pcie_port *pp); 80 void dw_pcie_setup_rc(struct pcie_port *pp); 81 int dw_pcie_host_init(struct pcie_port *pp); 82 83 #endif /* _PCIE_DESIGNWARE_H */ 84